17 Jan '15, 4pm

#OnThisDay in 1871, Hallidie received a patent for his cable car system that would be implemented in San Francisco.

#OnThisDay in 1871, Hallidie received a patent for his cable car system that would be implemented in San Francisco.

Cable cars began on the steep streets of San Francisco when inventor Andrew Smith Hallidie introduced them as an early form of public transportation. Cable-operated railways began in England in the 1820s but were abandoned and replaced with steam locomotives after the ropes used for the system wore out easily. While working to manufacture wire rope in California, Hallidie invented the Hallidie ropeway for transporting ore and other materials in iron buckets across mountainous districts using an elevated, endless moving cable. To improve the strength and stability of the cables, Hallidie developed a crucible steel cable with six strands of nineteen wires each that could bend and straighten repeatedly and not break. On January 17, 1871 Hallidie was granted patent 110,971 for an "improvement in endless wire ropeways" which would be the basis for his cable car system. Accordin...

Full article: http://www.edn.com/electronics-blogs/edn-moments/4427198/...

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